A few days ago
Multiple-choice question about chemical and physical changes…?
Which of these does represents a physical change?
a-filtering
b-dissolving salt in water
c-boiling water
Thanks!
Top 3 Answers
A few days ago
Favorite Answer
C- because the water is not changing chemically, but physically into gas when it vaporizes. H2O is still H2O when it is a gas. It’s not B because the water starts a chemical change, and it’s not A because when using a filter, you can eliminate the chemicals you do not want.
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A few days ago
As much as I’d love to just straight-out give you the answer…I think that teaching you would be better. Think about it. Filtering…does anything really change? Dissolving salt in water…is the salt still there? What about boiling water? The water is still there, but is it in the same state?
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A few days ago
Well it’s either b or c but im thinking b. because once you dissolve the salt in the water it causes a change in the water. and for c if you boil water, yes some water is dissolved but it is still water.
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